Choukou Sennin Haruka: vol.3

Takamaru is a student at the Ten Treasure Academy, living an ordinary school life, seeking romances which are constantly interfered by Shihoudou Narika. One day, he fell in love at first sight with a transfer student named Takamori Haruka. On that very night, Takamaru and Narika became pursued by a group of mysterious ninja. Just when they thought all hope is lost, Haruka appeared in kunoichi attire. Haruka referred to Takamaru as "young boss", and asked him to do H stuff towards her. This gave her power that enabled her to defeat the mysterious ninjas. However, this was just the beginning of a very long battle.